Proteus 40 Real-Time COD, BOD & E. coli Monitor
| Brand | Proteus |
|---|---|
| Origin | United Kingdom |
| Model | Proteus 40 |
| Instrument Type | Online Analyzer |
| Measurement Principle | UV-Vis Absorbance (275 nm) + Electrochemical/Biosensor Hybrid Detection |
| Measurement Range | 0–600 mg/L COD |
| Accuracy | ±5% FS |
| Repeatability | <±5% RSD |
| LOD | 0.01 mg/L COD |
| Response Time | Continuous Real-Time Output |
| Compliance | CE, UKCA, RoHS |
| Data Transmission | Bluetooth 5.0, RS-485, Modbus TCP, Optional 4G/LTE |
Overview
The Proteus 40 Real-Time COD, BOD & Escherichia coli Monitor is a field-deployable, multi-parameter environmental sensing platform engineered for continuous, unattended operation in demanding aquatic environments. Unlike conventional lab-based or batch-mode analyzers, the Proteus 40 employs a hybrid measurement architecture: UV absorbance at 275 nm for chemical oxygen demand (COD) quantification—correlating with aromatic and unsaturated organic compounds—and integrated electrochemical and impedance-based biosensing modules for surrogate estimation of biochemical oxygen demand (BOD5) and viable E. coli cell concentration. This approach eliminates reliance on 5-day incubation or membrane filtration, enabling true real-time trend analysis with sub-hour temporal resolution. The system is calibrated against standardized reference methods (ISO 6060 for COD, ISO 5815-1 for BOD, and ISO 9308-1 for E. coli) and validated across municipal wastewater influent/effluent, combined sewer overflows (CSOs), groundwater abstraction points, and industrial discharge monitoring stations.
Key Features
- Simultaneous real-time measurement of COD, BOD surrogate, and E. coli concentration—no sample pre-treatment or reagent addition required
- UV-Vis optical path optimized at 275 nm for enhanced selectivity toward oxidizable organics; dual-beam design compensates for fouling and turbidity drift
- Integrated temperature, pH, dissolved oxygen (DO), conductivity, and ORP sensors co-located within the same probe housing for contextual parameter correlation
- Ruggedized stainless-steel and PEEK construction rated IP68 for permanent submersion up to 10 m depth; anti-fouling hydrophobic coating reduces biofilm adhesion
- Onboard data logging (up to 12 months at 5-minute intervals) with automatic time-stamped calibration verification records
- Bluetooth 5.0 interface for local configuration and diagnostic access; optional cellular (4G/LTE) or Ethernet gateway for SCADA integration
Sample Compatibility & Compliance
The Proteus 40 operates directly in raw water matrices—including untreated sewage, stormwater runoff, riverine systems, and anaerobic digester effluents—without filtration or dilution. Its sensor suite is validated for total suspended solids (TSS) up to 1,200 mg/L and salinity up to 35 g/L (seawater strength). All measurements comply with EU Water Framework Directive (WFD) monitoring requirements and support regulatory reporting under UK Environmental Permitting Regulations (EPR) and US EPA Method 410.1 equivalency. Audit trails meet GLP and GMP data integrity standards per FDA 21 CFR Part 11 when used with Proteus Cloud™ software, including electronic signatures, user role-based access control, and immutable event logs.
Software & Data Management
Proteus Cloud™ is a secure, browser-based platform supporting remote configuration, firmware updates, and multivariate data visualization. It applies adaptive calibration algorithms that correct for seasonal drift using concurrent DO/pH/temperature trends. Raw sensor outputs are processed via embedded chemometric models trained on >15,000 paired field/lab datasets. Export formats include CSV, JSON, and OPC UA for integration into OSIsoft PI, Ignition SCADA, or custom LIMS. All data transmissions are encrypted using TLS 1.3; local edge processing ensures continuity during network outages with automatic sync upon restoration.
Applications
- Real-time BOD/COD compliance monitoring at wastewater treatment plant (WWTP) discharge points to prevent permit violations
- Early detection of sanitary sewer overflows (SSOs) and CSO events through rapid E. coli and organic load spikes
- Source tracking of fecal contamination in watershed management and groundwater protection zones
- Performance evaluation of tertiary treatment units (e.g., UV disinfection, activated carbon, membrane bioreactors)
- Industrial pretreatment verification for food processing, pharmaceutical, and pulp & paper facilities
- Research-grade longitudinal studies of organic pollutant dynamics in rivers, estuaries, and wetlands
FAQ
Does the Proteus 40 require daily maintenance or reagent replacement?
No. It is a reagent-free, maintenance-light platform. Quarterly mechanical cleaning and annual sensor verification are recommended.
Can it distinguish between fecal and non-fecal coliforms?
Yes—the biosensor module targets β-glucuronidase activity specific to E. coli, enabling differentiation from total coliforms with >92% specificity per ISO 9308-1 validation reports.
How is BOD estimated without incubation?
It correlates real-time oxygen consumption kinetics measured via microelectrode arrays with historical BOD5 lab data using adaptive machine learning models—not a fixed stoichiometric conversion.
Is the 275 nm UV measurement affected by nitrate interference?
Minimal interference occurs; onboard spectral compensation algorithms subtract baseline contributions from NO3− absorbance using dual-wavelength referencing.
What cybersecurity protocols are implemented?
Role-based authentication, end-to-end encryption, secure boot, and regular penetration testing aligned with IEC 62443-3-3 SL2 requirements.
